U字開(kāi)頭的單詞或詞組
undefined labelurinalup a gum treeup to scratchunsortedUAMunmanageableundaunteduplanduser's guideupdate fileupriseunfeelingunmoorundermanunconstitutionalup-unite withuntangleundervoltageunmovedunder heavenunchangingunited nations convention on contracts for the international sale of goodsunadornedunexaminedunheardunder the influence ofuntimelyunspeakumpteenunlicensedunrecoverableUdmhunsealunder licenseunconcernureteralup to the minuteumberunipolarunaccompanied
